one day, i'm gonna drive this to vegas. [ male announcer ] hurry in to your authorized mercedes-benz dealer for 1.99% financing during our certified pre-owned sales event through april 30th. >>> following a number of other stories. randi kaye has a 360 bulletin. >> in west virginia the search for four missing miners could resume if the air quality in the upper big branch mine continues to improve. rescuers entered the mine this morning but pulled out when gas levels became too high. officials are taking air samples every 15 minutes and say the levels are decreasing. >>> a 360 follow now. 15-year-old phoebe prince hanged herself last january, after months of harassment at a massachusetts high school. well, today lawyers entered not guilty pleas for three 16-year-old girls accused of bullying her. three other teenagers have already pled not guilty to a long list of charges. >>> tiger woods today shot a four under par 68 in augusta, georgia, his best opening round score of masters career and first tournament since the car accident last thanksgiving led to sexual revelations and a more t